Apparatus and method for adaptive fault detection in MV distribution circuits
US8390302B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2009 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Apr 29, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H1/0015
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and a protective device operable to perform the method are provided, wherein the method is for detecting and analyzing faults in a first cable and one or more other cables, which convey power in a three phase feeder system. Current magnitude in the first cable is compared to a threshold level. If the current magnitude exceeds the threshold level, the duration of the condition is measured. If the duration falls within a predetermined duration range, a predetermined time interval is allowed to pass and then a determination is made whether a fault is detected in the one or more other cables. If a fault is not detected in the one or more other cables, then a determination is made that a single phase fault has occurred in the feeder system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.